2D conductive bimetallic metal-organic framework membranes for ultrafast degradation of organic pollutants

Peroxymonosulfate (PMS)-based advanced oxidation processes are commonly recognized as an effective strategy for eliminating refractory organic pollutants from water. While significant efforts have been made to develop PMS activation efficiency, the low conductivity of PMS activators and the short lifespan of the reactive species still limit their catalytic performance. In this study, we synthesize a series of bimetallic conductive metal-organic framework (cMOFs) membranes, ZnCo-Tetrakis(4-carboxyphenyl)porphyrin (ZnCo-TCPP), by precisely tuning the morphology and conductivity of two-dimensional frameworks through controlled Zn and Co ion ratios. The resulting membrane obtained 100% removal efficiency of bisphenol A and five other pollutants, demonstrating a high-water flux of 308 L m -2 h -1 bar -1 and an exceptionally fast reaction rate constant of 2 000 min-1. Quenching tests and chemical probe analysis confirmed that hydroxyl radicals (·OH) and sulphate radicals (SO 4 •- ) played dominant roles in the ZnCo-TCPP/PMS system. This study presents a novel strategy for morphology engineering in cMOFs and advances their application in high-performance PMS-based water purification.